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(n.) A greeder is a dog breeder. But specifically, it's a puppy mill dog breeder who only cares about profit, but the animals.

Which, of course, is no good - but it's mostly judgemental Furmoms who use the term, and they call EVERY breeder a "greeder" because they don't believe in ANY breeding. Their motto is "Adopt don't shop" and will shame anyone who wants a pure bred dog for supporting "Greeders"
That SJW called me a greeder for raising a litter of puppies
Greeder by Jacaranda March 27, 2020
Related Words
Anyone over the age of thirty that faithfully watches and gets overly excited about the show "Glee".
Dave: "Dude! I can't wait for tonight's show! Brittany is doing Britney! I'm Gleeking out! Can I hang out and watch the show in your room with the other Gleeks? I'll make the popcorn!"

Ariel: "DAD! GROSS! You are such a Gleezer! Why don't you get a grip and go watch Dancing with the Stars in the living room with Mom?"
Gleezer by Mizjames December 6, 2010

Gleecerine 

A liquid used by actors when the director requires them to shed tears of joy.
The inexperienced actor had to use gleecerine to get the right the scene of crying with happiness.
Gleecerine by Jay Divanji October 13, 2007
thief; comes from Arthur cartoon episode "World's Greatest Gleeper"
That gleeper took my wallet!
gleeper by gleeper1 July 5, 2010

gleemergency 

an emergency situation or state of being related to the tv show GLEE.
1) Hey someone miscounted- there's 5 nerds coming over but we only have 4 slushies- Gleemergency!!!

2) "So Puck is still dating that fat chick? Somebody push the gleemergency re-write button- stat!"
gleemergency by Fan of Frenzy January 27, 2011
Some one who is addicted to the popular Fox Show about a high school show choir. A Gleeker Would NEVER miss an episode and finds themselves singing Glee inspired songs through the week until the next episode airs.
Betty: I can't hang out tonight I have to be home on time to watch Glee!

Rose: Your such a GLEEKER!!!
Gleeker by Ladii SaGa November 3, 2010